21150011411105 has 8 divisors (see below), whose sum is σ = 25380518237352. Its totient is φ = 16919672766208.

The previous prime is 21150011411101. The next prime is 21150011411119. The reversal of 21150011411105 is 50111411005112.

It can be written as a sum of positive squares in 4 ways, for example, as 9570255777889 + 11579755633216 = 3093583^2 + 3402904^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21150011411105 - 2² = 21150011411101 is a prime.

It is a super-3 number, since 3×21150011411105³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21150011411101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41768504 + ... + 42271833.

It is an arithmetic number, because the mean of its divisors is an integer number (3172564779669).

Almost surely, 2^{21150011411105} is an apocalyptic number.

It is an amenable number.

21150011411105 is a deficient number, since it is larger than the sum of its proper divisors (4230506826247).

21150011411105 is an equidigital number, since it uses as much as digits as its factorization.

21150011411105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84090675.

The product of its (nonzero) digits is 200, while the sum is 23.

Adding to 21150011411105 its reverse (50111411005112), we get a palindrome (71261422416217).

The spelling of 21150011411105 in words is "twenty-one trillion, one hundred fifty billion, eleven million, four hundred eleven thousand, one hundred five".